51966671 has 4 divisors (see below), whose sum is σ = 55023552. Its totient is φ = 48909792.

The previous prime is 51966643. The next prime is 51966701. The reversal of 51966671 is 17666915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51966671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51966371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528415 + ... + 1528448.

It is an arithmetic number, because the mean of its divisors is an integer number (13755888).

Almost surely, 2^51966671 is an apocalyptic number.

51966671 is a deficient number, since it is larger than the sum of its proper divisors (3056881).

51966671 is a wasteful number, since it uses less digits than its factorization.

51966671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056880.

The product of its digits is 68040, while the sum is 41.

The square root of 51966671 is about 7208.7912301578. The cubic root of 51966671 is about 373.1713544947.

The spelling of 51966671 in words is "fifty-one million, nine hundred sixty-six thousand, six hundred seventy-one".